/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.calculator;

import java.util.Vector;

import com.jy.appmarket.R;

import org.javia.arity.SyntaxException;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

class HistoryAdapter extends BaseAdapter {
	private Vector<HistoryEntry> mEntries;
	private LayoutInflater mInflater;
	private Logic mEval;

	HistoryAdapter(Context context, History history, Logic evaluator) {
		mEntries = history.mEntries;
		mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		mEval = evaluator;
	}

	// @Override
	public int getCount() {
		return mEntries.size() - 1;
	}

	// @Override
	public Object getItem(int position) {
		return mEntries.elementAt(position);
	}

	// @Override
	public long getItemId(int position) {
		return position;
	}

	@Override
	public boolean hasStableIds() {
		return true;
	}

	// @Override
	public View getView(int position, View convertView, ViewGroup parent) {
		View view;
		if (convertView == null) {
			view = mInflater.inflate(R.layout.calculator_history_item, parent, false);
		} else {
			view = convertView;
		}

		TextView expr = view.findViewById(R.id.historyExpr);
		TextView result = view.findViewById(R.id.historyResult);

		HistoryEntry entry = mEntries.elementAt(position);
		String base = entry.getBase();
		expr.setText(entry.getBase());

		try {
			String res = mEval.evaluate(base);
			result.setText("= " + res);
		} catch (SyntaxException e) {
			result.setText("");
		}

		return view;
	}
}
